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mergetools/meld: make usage of `--output` configurable and more robust 

Older versions of meld listed --output in `meld --help`.
Newer versions only mention `meld [OPTIONS...]`.
Improve the checks to catch these newer versions.

Add a `mergetool.meld.hasOutput` configuration to allow
overriding the heuristic.

Reported-by: Andrey Novoseltsev <novoselt@gmail.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
David Aguilar 2014-10-15 21:45:14 -07:00 committed by Junio C Hamano
parent 3c2dc76f01
commit b12d04503b
2 changed files with 16 additions and 2 deletions
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9
Documentation/config.txt
View File

@ -1754,6 +1754,15 @@ mergetool.<tool>.trustExitCode::
if the file has been updated, otherwise the user is prompted to
indicate the success of the merge.
mergetool.meld.hasOutput::
Older versions of `meld` do not support the `--output` option.
Git will attempt to detect whether `meld` supports `--output`
by inspecting the output of `meld --help`. Configuring
`mergetool.meld.hasOutput` will make Git skip these checks and
use the configured value instead. Setting `mergetool.meld.hasOutput`
to `true` tells Git to unconditionally use the `--output` option,
and `false` avoids using `--output`.
mergetool.keepBackup::
After performing a merge, the original file with conflict markers
can be saved as a file with a `.orig` extension. If this variable

9
mergetools/meld
View File

@ -18,13 +18,18 @@ merge_cmd () {
check_unchanged
}
# Check whether 'meld --output <file>' is supported
# Check whether we should use 'meld --output <file>'
check_meld_for_output_version () {
meld_path="$(git config mergetool.meld.path)"
meld_path="${meld_path:-meld}"
if "$meld_path" --help 2>&1 | grep -e --output >/dev/null
if meld_has_output_option=$(git config --bool mergetool.meld.hasOutput)
then
: use configured value
elif "$meld_path" --help 2>&1 |
grep -e '--output=' -e '\[OPTION\.\.\.\]' >/dev/null
then
: old ones mention --output and new ones just say OPTION...
meld_has_output_option=true
else
meld_has_output_option=false